What does Capryloyl serine/silk amino acid methyl esters do?

Used in cosmetics as a skin-conditioning agent and a hair conditioner. Capryloyl Serine/Silk Amino Acids Methyl Esters is the condensation product of caprylic acid chloride with the methyl esters of silk amino acids and serine.

Is Capryloyl serine/silk amino acid methyl esters safe?

We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

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Capryloyl serine/silk amino acid methyl esters

Concern score

Not assessed — no hazard data yet.

Capryloyl serine/silk amino acid methyl esters in plain language

What it does: Used in cosmetics as a skin-conditioning agent and a hair conditioner. Capryloyl Serine/Silk Amino Acids Methyl Esters is the condensation product of caprylic acid chloride with the methyl esters of silk amino acids and serine.
Skin conditioning
Hair conditioning
Is it a concern?: We haven't assessed a concern score for this ingredient yet. It is listed for cosmetic use in the EU.

What we know about this ingredient

Canonical ingredient record built from 1 public-source records.

Regulation

No restrictions found. Capryloyl serine/silk amino acid methyl esters appears in these published regulatory listings.

EUCosIngActiveCapryloyl Serine/Silk Amino Acids Methyl Esters is the condensation product of caprylic acid chloride with the methyl esters of silk amino acids and serine
- Capryloyl Serine/Silk Amino Acids Methyl Esters is the condensation product of caprylic acid chloride with the methyl esters of silk amino acids and serineSource →

Expert safety opinions

No expert opinion on file for Capryloyl serine/silk amino acid methyl esters. These are the independent scientific bodies that assess ingredients like this one; we show an opinion only when a record we hold cites it.

SCCS
EU Scientific Committee on Consumer Safety
No SCCS opinion on file.
CIR
Cosmetic Ingredient Review (US expert panel)
No CIR safety assessment on file.

Evidence & sources

No graded research studies for Capryloyl serine/silk amino acid methyl esters yet. This record is compiled from the published data sources below — registries and regulatory listings, not study findings.

1 data source

Where this comes from

CosIng
regulatory · updated 2026-09-23
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Suitability

Context-specific fit derived from published classifications and the current ingredient evidence profile.

Fragrance avoidance

Nothing to weigh for this context yet.

No signal in this context

We have no published hazard signal for this ingredient, so we cannot say how it behaves in this context — that is missing evidence, not a clean result.